Infrared Imaging of M82: a Starburst in an Edge-On Barred Galaxy
Infrared Imaging of M82: a Starburst in an Edge-On Barred Galaxy
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M82 的红外成像：边缘棒状星系中的星暴
DOI：
10.1086/169744
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
R. Decher
中科院分区：
文献类型：
--
作者：
C. Telesco;H. Campins;M. Joy;K. Dietz;R. Decher
星暴星系M82的新1-30微米图像被提出。M82在2微米处的出现表明，在它的中心有一个大约1kpc长的条。这个棒状结构可能会显著地影响气体动力学，并可能导致与恒星形成的发光片段相关的中央气体和尘埃环的形成。中红外图将环面结构定义为30微米，并显示发射区域的范围至少为1.3 kpc。由1-2微米颜色确定的吸收光学深度对应于A(v)小于约8，分布在横跨星爆区域的脊状结构中，与H I光学深度的分布非常相似。最后，考虑了非常小的颗粒可能对10微米发射的贡献，并得出结论，与银河H II区域相比，它们的中红外发射是显著的。
New 1-30-micron images of the starburst galaxy M82 are presented. The appearance of M82 at 2 microns indicates that a bar about 1 kpc long is located at its center. This bar may dramatically influence the gas dynamics and may have caused the formation of the central gas and dust toroid associated with the luminous episode of star formation. The mid-IR maps define the structure of the toroid out to 30 microns and show that the extent of the emitting region is at least 1.3 kpc. The absorption optical depth determined from 1-2 micron colors corresponds to A(v) less than about 8 and is distributed in a ridge spanning the starburst region and closely resembling the distribution of H I optical depth. Finally, the contribution that very small grains may make to the 10-micron emission is considered, and it is concluded, by comparison to Galactic H II regions, that their mid-IR emission is significant.